Laser driven quantum rings: one byte logic gate implementation

Abstract

We study the effect of the carrier-envelope-phase (CEP) on the high harmonic generation (HHG) from a quantum ring driven by two short orthogonal lasers polarized along the x and y axes.

Laser Assisted Dirac Electron in a Magnetized Annulus

“…As mentioned in the Introduction, a plethora of schemes, requiring the presence of a magnetic field, has been advanced to overpass the problem. Rings and annuli are perfectly suitable to be used with a magnetic field because of their circular symmetry; they provide a fundamental environment for basic and applicative use [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. Now, we discuss the problem of the annulus crossed by an orthogonal static magnetic field B 0 .…”

“…Subsequently, it is possible, by using the orbital angular momentum m and the magnetic field B 0 as control knobs of an experiment, to produce filiform currents circulating in a reduced portion of the annulus. Such currents may be used in informatics technology [20,29,31,34,35,[37][38][39][40][41][42]. Furthermore, an adiabatic increase of B 0 does not induce transition amongst the levels, but pushes the electron towards large ρ.…”

Dynamic clock generator and memory mass device using a quantum ring driven by three-color laser fields

“…Indeed, the versatility of QRs in the design of fast operating all-optical logic gates is noteworthy and has been discussed. Thus a QR driven by a two color laser eld has been studied 8,9 as a function of the relative intensity and phase of the two color-elds; the ne tuning of these two parameters controls the presence and absence of groups of harmonics. By assigning a logic value to the presence or absence of a particular harmonic it is possible to obtain two/three/four-state logic gatesthus extending the traditional binary logicoperating in the time range of 10 À15 s, therefore in a faster range than the usual gates.…”